<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      // pockets → bed → table → head
      let head = { glasses: 1 };
      let table = { pen: 3, __proto__: head };
      let bed = {
        sheet: 1,
        pillow: 2,
        __proto__: table,
      };
      let pockets = { money: 2000, __proto__: bed };

      console.log(pockets.glasses); //1
      console.log(head.glasses); //1
    </script>
  </body>
</html>
